The abdominal aorta divides at L5 to form the two
A. inferior mesenteric arteries.
B. common iliac arteries.
C. superior mesenteric arteries.
D. femoral arteries.
E. renal arteries.
B
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Humans are able to distinguish several million shades of color because
A. humans have large retinas. B. humans have binocular vision. C. they have many different types of cone cells. D. different proportions of cone cells respond to each wavelength of light. E. humans have more cones than rods.
The period of time in which cardiac muscle cells are insensitive to further stimulation is called the
A. ectopic focus. B. AV period. C. hyperpolarization period. D. SA period. E. absolute refractory period.
The process of protein formation directed by mRNA is called
A) replication. B) transcription. C) translation. D) mitosis. E) auscultation.
Presence of a synovial cavity, articular cartilage, synovial membrane, and ligaments are characteristics of what type of joint?
A) suture B) synchondrosis C) symphysis D) hinge joint